Bug 415503

Application: ksysguard (5.17.4)

Qt Version: 5.13.2
Frameworks Version: 5.65.0
Operating System: Linux 5.0.0-37-generic x86_64
Distribution: KDE neon User Edition 5.17

-- Information about the crash:
- What I was doing when the application crashed:

This crash occurs on close of ksysguard. It happens somewhat sporadically, and I believe it may be related to long running KSysGuard processes. Possibly related to watching graphs.

The crash can be reproduced sometimes.

-- Backtrace:
Application: System Monitor (ksysguard), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6404550bc0 (LWP 16688))]

Thread 4 (Thread 0x7f63bd910700 (LWP 3115)):
#0  0x00007f6403e2ebf9 in __GI___poll (fds=0x7f63b8007030, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f63c24c1481 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f63c24b2e40 in pa_mainloop_poll () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f63c24b34d0 in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f63c24b3560 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f63c24c13c9 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f63c2263318 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f63f30d76db in start_thread (arg=0x7f63bd910700) at pthread_create.c:463
#8  0x00007f6403e3b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f63d4b10700 (LWP 16690)):
#0  0x00007f6403e2ebf9 in __GI___poll (fds=0x7f63c8004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f63f11575c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f63f11576dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f63ff540b9b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f63ff4e106a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f63ff2fc3aa in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f63ffc570e5 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f63ff2fdb52 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f63f30d76db in start_thread (arg=0x7f63d4b10700) at pthread_create.c:463
#9  0x00007f6403e3b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f63d8398700 (LWP 16689)):
#0  0x00007f6403e2ebf9 in __GI___poll (fds=0x7f63d83978e8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f63f3932747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f63f393436a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f63da2e3e10 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f63ff2fdb52 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f63f30d76db in start_thread (arg=0x7f63d8398700) at pthread_create.c:463
#6  0x00007f6403e3b88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f6404550bc0 (LWP 16688)):
[KCrash Handler]
#6  0x00007f63ff385eaa in operator==(QString const&, QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6400948577 in QLabel::setText(QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#8  0x00007f640417e460 in  () at /usr/lib/x86_64-linux-gnu/libkdeinit5_ksysguard.so
#9  0x00007f64031c9bf2 in KSGRD::SensorAgent::processAnswer(char const*, int) () at /usr/lib/x86_64-linux-gnu/libksgrd.so.7
#10 0x00007f64031d0cd4 in  () at /usr/lib/x86_64-linux-gnu/libksgrd.so.7
#11 0x00007f63ff5139ef in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f63ff45167a in QProcess::readyReadStandardOutput(QProcess::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f63ff458431 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f63ff458900 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f63ff5138d5 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007f63ff520028 in QSocketNotifier::activated(int, QSocketNotifier::QPrivateSignal) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f63ff5203e2 in QSocketNotifier::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f6400816eac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007f640081e4b0 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007f63ff4e2f08 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f63ff5417e8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f63f1157417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f63f1157650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f63f11576dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f63ff540b7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f63ff4e106a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f63ff4ea3e0 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f640418036a in kdemain () at /usr/lib/x86_64-linux-gnu/libkdeinit5_ksysguard.so
#29 0x00007f6403d3bb97 in __libc_start_main (main=0x55c6f04f0720, argc=1, argv=0x7ffc4ef1f4f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc4ef1f4e8) at ../csu/libc-start.c:310
#30 0x000055c6f04f075a in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 414802, bug 414845.

Possible duplicates by query: bug 415339, bug 415110, bug 415109, bug 414974, bug 414966.

Reported using DrKonqi